sasl: add option to show which mechanisms failed and succeeded
sasl: add option to show which mechanisms failed and succeeded

Fix #770

znc/znc,elyscape/znc,markusj/znc,Mkaysi/znc,KiNgMaR/znc,dgw/znc,kashike/znc,Mikaela/znc,jreese/znc,GLolol/znc,evilnet/znc,Phansa/znc,GLolol/znc,Adam-/znc,DarthGandalf/znc,KiNgMaR/znc,jreese/znc,znc/znc,GLolol/znc,KiNgMaR/znc,Adam-/znc,Zarthus/znc,Mikaela/znc,dgw/znc,kashike/znc,BtbN/znc,DarthGandalf/znc,znc/znc,jreese/znc,kashike/znc,DarthGandalf/znc,psychon/znc,Mkaysi/znc,znc/znc,BtbN/znc,Mkaysi/znc,Adam-/znc,psychon/znc,psychon/znc,wolfy1339/znc,Mkaysi/znc,Zarthus/znc,elyscape/znc,Mikaela/znc,dgw/znc,Zarthus/znc,wolfy1339/znc,kashike/znc,kashike/znc,markusj/znc,psychon/znc,Adam-/znc,jreese/znc,Mikaela/znc,elyscape/znc,BtbN/znc,wolfy1339/znc,GLolol/znc,KiNgMaR/znc,evilnet/znc,wolfy1339/znc,Mikaela/znc,Mkaysi/znc,DarthGandalf/znc,Phansa/znc,Zarthus/znc,dgw/znc,BtbN/znc,Phansa/znc,markusj/znc,Adam-/znc,markusj/znc,elyscape/znc,wolfy1339/znc,BtbN/znc,Zarthus/znc,wolfy1339/znc,DarthGandalf/znc,elyscape/znc,GLolol/znc,Adam-/znc,Phansa/znc,jreese/znc,Mkaysi/znc,psychon/znc,evilnet/znc,Zarthus/znc,evilnet/znc,psychon/znc,znc/znc,markusj/znc,DarthGandalf/znc,dgw/znc,Mkaysi/znc,Mikaela/znc,KiNgMaR/znc,KiNgMaR/znc,Phansa/znc,markusj/znc,jreese/znc,znc/znc,kashike/znc,evilnet/znc,elyscape/znc,evilnet/znc,Phansa/znc,BtbN/znc,dgw/znc,Adam-/znc,Mikaela/znc,GLolol/znc